Setbacks Explained (Bidhimala Table 1)

What are setbacks?

Setbacks are minimum distances the building must be set back from the plot boundary (front, rear, sides) and from neighbouring buildings. They ensure light, ventilation, fire access, and road visibility.

Bidhimala 2025 Table 1

PlanBD resolves setbacks from total storey count (including ground floor), matched to the recommended G+N height from floor scenarios:

Storey band	Example	Front	Rear	Side (each)	Building-to-building
Up to 7	G+6	1.5 m	1.5 m	1.0 m	2.0 m
8–10	G+7 to G+9	1.5 m	2.0 m	1.25 m	2.5 m
11–14	G+10 to G+13	2.0 m	2.0 m	1.5 m	2.5 m
15+	G+14+	3.0 m	3.0 m	2.0 m	3.0 m

Implementation: src/lib/bidhimala-setbacks.ts.

Front setback note

Bidhimala §41(1) allows measuring front setback from road centre (≥4.5 m) or plot boundary (≥1.5 m). The calculator reports the Table 1 minimum from the plot boundary and notes the road-centre alternative.

Corner plots

If your plot fronts two roads, side setbacks may apply on both frontages — the calculator flags this as a warning.

See setbacks in the FAR Calculator report (section 6) and the plot diagram in the web/PDF output.